单项选择题

Among the deaf and dumb ______ may be carried on by means of the finger alphabet.

A．communication
B．calculation
C．transportation
D．vision
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单项选择题
Some science students reach a high ______ of English competence in communication.
A．level
B．plane
C．surface
D．live
单项选择题
The newly - formed United States took as its emblem a bald eagle with ______ wings.
A．graceful
B．colorful
C．grand
D．outspread
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